CDL General Knowledge Practice Test

Using high beams when legal is the correct approach because high beams significantly increase your visibility in low-light conditions. They illuminate the road and surroundings more effectively than low beams, enabling you to see further ahead and spot any potential hazards, animals, or obstacles on the road. Keeping the interior lights off helps maintain night vision by preventing glare that can limit your ability to see outside. In contrast, switching to parking lights does not provide adequate illumination for driving; they are only meant for use when the vehicle is stationary. Reducing speed and driving cautiously might seem reasonable but does not address the visibility issue directly. It could be an appropriate action, but without adjusting your headlights, you may still struggle to see effectively. Turning off your headlights is dangerous as it eliminates your visibility entirely, increasing the risk of an accident.